JSFiddle - React, Tailwind, and code Playground

HTML

<label>Amount:
    <select name=amount>
        <option selected value='0'>Any</option>
        <option value='1'>100+</option>
        <option value='2'>200+</option>
        <option value='3'>500+</option>
        <option disabled value='4'>Specify</option>
    </select>
</label>

JavaScript

var elems = document.querySelectorAll('[disabled]');
for (var i = 0; i < elems.length; i++) {
    /* elems[i].removeAttribute('disabled') */;
}